Porter had 15 of his 19 points in the second half and grabbed 14 rebounds for the Hoyas (17-4, 7-3 Big East), who have won five straight and seven of their last eight. Mikael Hopkins had 12 of his 14 points after halftime and D'Vaun Smith-Rivera scored 13.

Eli Carter had 23 points for the Scarlet Knights (12-10, 3-8), who lost their sixth straight.

After a string of nine straight scoring sequences produced either a lead change or tie, Porter scored on a fast-break layup to make it 62-60 with 4:44 left to give the Hoyas the lead for good.

With Georgetown leading 62-61, the Hoyas came out of a timeout and got a critical three-point play from Porter off an entry pass from Starks to lead by four with 1:15 remaining.